How to get one by one value from result of group_concat mysql?

Question

For example I got result using group_concat

Example result is:

SELECT GROUP_CONCAT(customerid) FROM customers;

output is:

121,123,60,24,56,78,45,67,143,etc 

Based on customerid now I want to update some details in another table.

Answer 1

Don't use group_concat() . Use a subquery or join . Something like this:

update othertable
    set col = value
    where customerid in (select customerid from customers);

Answer 2

Another option is to do a JOIN between the tables rather than use a subquery:-

UPDATE fcl_bl a
INNER JOIN notes b
ON a.file_number = b.module_ref_id
AND b.module_id = 'file' 
AND b.note_desc LIKE '%(Received SSL Master -> Yes to No)%'
SET a.received_master='Yes' 
WHERE received_master='No'